PC/CP300 Electronics Laboratory II
Resistive Sensors Lab Requirements
Objective
The lab supervisor will assign a specific sensor to each group. Groups will design circuits with the assigned sensor and then demonstrate the calibration and operation to the other groups in the lab.
- to calibrate a resistive sensor
- to use the resistive sensor in a circuit
Equipment
- bench supply, multimeter, breadboard
- other components as required by the design
- one of:
- regular open cell light dependent resistor (LDR), photocell, photoresistor, photoconductive cell
- Disc Type NTC Thermistors 20 Ohm [datasheet, NTC Application Notes]
Procedure
- For the transducer's range of operation select the range
that you will be working in. You do not have to cover the
complete range of operation.
Determine the transducer output at several points within your
selected working range. Produce a calibration curve using these
values.
Demonstrate your calibration procedure and results to the lab supervisor.
- Design and build a circuit which will convert the transducer
output over the range you have chosen into a voltage which will
go from 0 to 5 volts over that range. Make sure you can get
below 0.5V and above 4.5V.
Demonstrate the circuit over the selected range to the lab supervisor.